I don't think it's a case of better treatment. PIPEDA is very explicit when it comes to issues of sensitive information. Quite frankly, I'd have to think about what other things and areas might need to be added.
Certainly, there are some people who consider their address a piece of sensitive information, as is their cellphone number and, increasingly, this information that can identify them, such as your identifier on your cellphone. The way that your cellphone can actually be tracked could be considered sensitive information.